We look at the division of 70109877 by 399 
We want to figure out the number of times 70109877 can be divided by 399.

Advancing to step 1:
If we divide 7 by 399, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 399

Going ahead to step 2:
399 can be fit into 70 0 times, resulting in a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 70 leaves us with 70.
Fetch the next digit (1) from the dividend, attach it to 70 and continue: 701 / 399

Moving on to step 3:
701 divided by 399 is 1 with a remainder of 302.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 399 from 701 and we're left with 302.
Append the next digit (0) from the dividend to 302 and continue with: 3020 / 399

Step 4:
3020 divided by 399 is 7 with a remainder of 227.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtract 2793 from 3020 to get 227.
Fetch the next digit (9) from the dividend, attach it to 227 and continue: 2279 / 399

Step 5:
The number 399 fits into 2279 5 times, leaving a remainder of 284.
Use 5 as the next digit of our solution. 
Result so far: 175.0
If we take 1995 away from 2279, we end up with 284.
Include the next digit (8) from the dividend after 284, then repeat: 2848 / 399

On to step 6:
2848 divided by 399 is 7 with a remainder of 55.
The number 7 becomes the next digit in our result. 
Result so far: 1757.0
If we subtract 2793 from 2848, we get 55.
Grab the next digit (7) from the dividend, add it to 55, then carry on: 557 / 399

Going ahead to step 7:
The number 399 fits into 557 1 times, leaving a remainder of 158.
The number 1 becomes the next digit in our result. 
Result so far: 17571.0
If we subtract 399 from 557, we get 158.
Fetch the next digit (7) from the dividend, attach it to 158 and continue: 1587 / 399

Let's proceed to step 8:
When dividing 1587 by 399, we get 3 with a remainder of 390.
The next digit of our result is 3. 
Result so far: 175713.0
The remainder is 390 after subtracting 1197 from 1587.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Let's proceed to step 9:
If we divide 3900 by 399, we get 9 and a remainder of 309.
Put 9 as the next digit of the answer. 
Result so far: 175713.9
The remainder is 309 after subtracting 3591 from 3900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Moving on to step 10:
If we divide 3090 by 399, we get 7 and a remainder of 297.
Write down 7 as next digit of the result. 
Result so far: 175713.97
Subtracting 2793 from 3090 leaves us with 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Advancing to step 11:
The number 399 fits into 2970 7 times, leaving a remainder of 177.
Write down 7 as next digit of the result. 
Result so far: 175713.977
Subtract 2793 from 2970 to get 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

After the division, we end up with 175713.977 and a remainder of 0.0177.